diff --git a/tests/boundary/browser/cdpBrowserProvider.document_script.test.ts b/tests/boundary/browser/cdpBrowserProvider.document_script.test.ts
index 31596ab900..d9ec024078 100644
--- a/tests/boundary/browser/cdpBrowserProvider.document_script.test.ts
+++ b/tests/boundary/browser/cdpBrowserProvider.document_script.test.ts
@@ -9,13 +9,13 @@ import { startFakeCdpBrowser } from "../../fixtures/fakeCdpBrowser.js";
 import { describeBrowser, trackBrowser } from "./cdpBrowserProvider.support.js";
 
 describeBrowser("CdpBrowserProvider: document script 1", () => {
-  it("rejects removed caller-facing WebMCP item and schema limits", () => {
+  it("rejects unknown WebMCP discovery fields", () => {
     expect(
       discoverWebMcpToolsInputSchema.safeParse({
         cdp_endpoint: "http://127.0.0.1:9222",
         allowed_origins: ["https://example.test"],
         target_id: "target",
-        max_tools: 1,
+        unknown_field: true,
       }).success,
     ).toBe(false);
   });
diff --git a/tests/boundary/browser/cdpElectronProvider.test.ts b/tests/boundary/browser/cdpElectronProvider.test.ts
index 322c355d2c..0abf0a2eba 100644
--- a/tests/boundary/browser/cdpElectronProvider.test.ts
+++ b/tests/boundary/browser/cdpElectronProvider.test.ts
@@ -200,11 +200,11 @@ describe("CdpElectronProvider target selection", () => {
 });
 
 describe("Electron request schemas", () => {
-  it("rejects unknown fields and removed collection limits", () => {
+  it("rejects unknown request fields", () => {
     expect(
       listElectronTargetsInputSchema.safeParse({
         cdp_endpoint: "http://127.0.0.1:9223",
-        allowed_file_root: "/tmp/app",
+        unknown_field: true,
       }).success,
     ).toBe(false);
     expect(
@@ -212,7 +212,7 @@ describe("Electron request schemas", () => {
         cdp_endpoint: "http://127.0.0.1:9223",
         target_id: "page-1",
         observation_ms: 0,
-        limits: { max_dom_nodes: 20 },
+        unknown_field: true,
       }).success,
     ).toBe(false);
   });
diff --git a/tests/boundary/browser/javascriptRuntimeObservation.test.ts b/tests/boundary/browser/javascriptRuntimeObservation.test.ts
index c4be8d398a..108dc26335 100644
--- a/tests/boundary/browser/javascriptRuntimeObservation.test.ts
+++ b/tests/boundary/browser/javascriptRuntimeObservation.test.ts
@@ -28,12 +28,12 @@ import { startFakeV8Inspector } from "../../fixtures/fakeV8Inspector.js";
 import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
 
 describe("passive V8 Inspector provider", () => {
-  test("keeps collection budgets out of the caller schema", () => {
+  test("rejects unknown runtime observation fields", () => {
     expect(
       observeJavaScriptRuntimeToolInputSchema.safeParse({
         inspector_endpoint: "http://127.0.0.1:9229",
         target_id: "target-1",
-        limits: {},
+        unknown_field: true,
       }).success,
     ).toBe(false);
   });